Technician A says that narrow valve seats exert a higher force on the seat area. Technician B says that if intake and exhaust valve springs are of equal pressure, then the larger valve must have a narrower seat in order to have the same seating pressure as the smaller valve. Who is right?

Question

Quizplus · Accepted Answer

Technician A is correct because a narrow valve seat concentrates the force over a smaller area, resulting in higher pressure at the contact point between the valve and the seat. Technician B is also correct because, for valves of different sizes to have the same seating pressure with equal spring pressures, the larger valve must have a narrower seat to compensate for its larger surface area, ensuring the force is distributed in a way that maintains equal pressure.

Technician a Says That Narrow Valve Seats Exert a Higher